# RPN vs PiSquared

The clearest difference is update cadence: RPN at every 3 months against PiSquared's every 23 months. On price, ads, in-app purchases and device support there is nothing between them.

RPN costs $1.99 and PiSquared $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

RPN ships an update every 3 months, PiSquared every 23 months. The most recent releases landed on November 4, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | RPN | PiSquared |
| --- | --- | --- |
| Price | $1.99 | $1.99 |
| Rating | **[5.0 (9 ratings)](https://appshunter.io/ios/app/rpn-32-ce/id1082637146/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 23 months |
| Monetization | Paid | — |
| Size | 14 MB | 3 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [CuVee Software](https://appshunter.io/developer/424873503) | [Hartwig Wiesmann](https://appshunter.io/developer/1658877258) |

## What reviewers say

### RPN

[App page](https://appshunter.io/ios/app/rpn-32-ce/id1082637146)

This app is a photo-realistic simulation of a classic scientific calculator, offering advanced programming capabilities beyond the original model. It includes a comprehensive set of mathematical functions and features for easy program management and sharing.

**Highlights:** Photo-realistic calculator simulation, Fully programmable with 99 steps, Extensive scientific and statistical functions, Program library and sharing options, Import and export programs, 44 pre-installed programs

**Features:** macOS Compatibility

**In-app purchases:** none


### PiSquared

[App page](https://appshunter.io/ios/app/pisquared/id1615268645)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is RPN free?

RPN costs $1.99, with no in-app purchases.

### Is PiSquared free?

PiSquared costs $1.99, with no in-app purchases.

### Do RPN or PiSquared have ads?

Neither RPN nor PiSquared shows ads.

### Which is updated more often, RPN or PiSquared?

RPN ships an update every 3 months, and PiSquared every 23 months. Most recently, RPN was updated on November 4, 2026 and PiSquared on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*